Extended Draw Distance v0.1 AR Code works for Enemies, NPC's, big boulders, small rocks, gravestones, standalone grass, signs, scarecrows and other objects. Sadly the code don't work for Link HD model, trees, bushes, butterflies, grouped grass and other objects. The good thing is that it does not change the sound effects.

The first thing you notice, is that you can see Epona on the extended screen region in the beginning of the game.

Warning: Only use savestates where the code was active when you did it, otherwise, this AR Code don't will work with your savestate.

Extended Draw Distance v0.1 AR Code works for Enemies, NPC's, big boulders, small rocks, gravestones, standalone grass, signs, scarecrows and other objects. Sadly the code don't work for Link HD model, trees, bushes, butterflies, grouped grass and other objects. The good thing is that it does not change the sound effects.

The first thing you notice, is that you can see Epona on the extended screen region in the beginning of the game.

Warning: Only use savestates where the code was active when you did it, otherwise, this AR Code don't will work with your savestate.

The camera view don't return vertically to the center of the screen when you are in 1st Person View, if you have in hand the boomerang, the slingshot, the hookshot/longshot or the bow. Only use one item and press the "Return Button", usually "A" Button.

Extended Draw Distance v0.1 AR Code work for Enemies, NPC's, big boulders, small rocks, gravestones, standalone grass, signs, scarecrows and other objects. Sadly the code don't work for Link HD model, trees, bushes, butterflies, grouped grass and other objects. The good thing is that it does not change the sound effects.

Warning: Only use savestates where the code was active when you did it, otherwise, this AR Code don't will work with your savestate.

Extended Draw Distance v0.1 AR Code work for Enemies, NPC's, big boulders, small rocks, gravestones, standalone grass, signs, scarecrows and other objects. Sadly the code don't work for Link HD model, trees, bushes, butterflies, grouped grass and other objects. The good thing is that it does not change the sound effects.

Warning: Only use savestates where the code was active when you did it, otherwise, this AR Code don't will work with your savestate.

In the Wiki page of The Legend of Zelda: Collector's Edition you can find a Gecko Code that fixes the culling in the 3D games of this disc. Make Sure the Dolphin Widescreen Hack is Disabled before running the game to use this code.

Extended Draw Distance v0.1 AR Code work for Enemies, NPC's, big boulders, small rocks, gravestones, standalone grass, signs, scarecrows and other objects. Sadly the code don't work for Link HD model, trees, bushes, butterflies, grouped grass and other objects. The good thing is that it does not change the sound effects.

Warning: Only use savestates where the code was active when you did it, otherwise, this AR Code don't will work with your savestate.

This is really super impressive. I don't know how you exactly find the region offsets and values.
But I must say I have respect for you for bringing the ultimate Ocarina of Time experience.
I believe the CPU Clock Override is required for the increased distance AR Code, about 125% to 150% to keep the FPS steady at 20.
It tends to lower to 15 FPS without the CPU Clock Override when facing in an area where more objects are seen due the extended distance.

Could you port for example that code or make a similar code for the collector's edition version of Majora's Mask?
Or apply a heart recovery modifier effect to Ocarina of Time and Master Quest?
Majora's Mask could also benefit from code's such as damage and heart recovery modifiers. If even possible extended distance.

About the widescreen fix (which I suppose is the same as always), I've tried some time ago to extend the view even more (to make use of the free camera, and for wider aspect ratios). That screwed the hookshot red dot, making it the size of the entire screen, and the viewing angle didn't improve much.

Did you add it as an Action Replay code (not to be confused with a Gecko code) for the Ocarina of Time - Master Quest NTSC disc?
So far I know it only works with the D43E01 disc, both normal and master quest.
It seems to work for me. Try comparing when standing next to Mido facing the exit of Kokiri Village.
You should see an Fairy and a couple of rocks normally not seen at the house closest to the exit.
Or try comparing the opening demo scene where Epona comes in.

EDIT: All codes are Action Replay for the NTSC version of Master Quest, including the render fix.

The camera view don't return vertically to the center of the screen when you are in 1st Person View, if you have in hand the boomerang, the slingshot, the hookshot/longshot or the bow. Only use one item and press the "Return Button", usually "A" Button.

To return back the seeds to the Business Scrub:
Hold D-Pad Up to change to 20 FPS, when the seed is in the air, hold pressed the "Button" of the shield, once the seed go back to the Business Scrub, release the "Button" of the shield, wait until the Business Scrub complete all the animation when go outside of the hole, then release D-Pad Up.
If you change to 20 FPS and the seeds still exploding in front of the Business Scrub, stay away a little and then go closer.

Warning:
In Deku Tree, burning the last spider web with the deku stick on flames, was HARD AS HELL.
This will be a good trial for your skills.